SanDisk (SNDK) Surges 12.8% After Hours as New Standalone Chipmaker Finds Its Footing
As seen on the 24/7 Wall St. homepage on July 30, 2026.
SanDisk surged 12.8% intraday as the newly independent memory chipmaker stabilizes after returning to the S&P 500.
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SanDisk opened the session at $1,135.04 and climbed to $1,279.96 by the time after-hours trading was captured, a gain of roughly 12.8% on the day. The move comes as the memory chipmaker settles into life as an independent company following its spinoff, a transition that has also seen it reclaim a spot in the S&P 500.
Rejoining the S&P 500 is a meaningful milestone for a newly standalone firm, since index inclusion typically triggers automatic buying from funds that track the benchmark, which can provide a structural floor beneath the share price. For SanDisk, that dynamic appears to be playing out in real time as the stock works through its post-spinoff price discovery.
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The after-hours session can amplify moves that may not fully hold into the next regular trading day, so the $1,279.96 level is worth watching as a reference point when markets open. Investors will be looking to see whether the stabilization narrative holds as the company begins reporting results and setting guidance on its own for the first time.
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Mentioned: SNDK